1FG9:
reference: Observation of an unexpected third receptor molecule in the crystal structure of human interferon-gamma receptor complex., Thiel DJ, le Du MH, Walter RL, D'Arcy A, Chene C, Fountoulakis M, Garotta G, Winkler FK, Ealick SE, Structure Fold Des 2000 Sep 15;8(9):927-36. PMID: 10986460

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